Syringe



Dec. 3l, 1946. M. L. FOLKMAN 2,43,303

- SYRINGE Filed Jan. 17, 1944 2 Sheets-Sheet l mw R. y/Wlmm. y

-m Il: .E W Q W ,WW 4 mx Il, M n. N um NN Q n w ATTORNEYS ec. 3l, 1946.M. 1 FOLKMAN SYRINGE Filed Jan. 17, 1944 2 Sheets-Sheet 2 Patented ec.31, 1946 UNITED STATES PATENT OFFICE SYRINGE 'i Marvin L. Folkman,Shaker Heights, Ohio Application January 17, 1944, Serial No. 518,601

` 12 anims. (ol. 12s-215) My present invention appertains to the art ofsurgical instruments, and involves primarily a novel construction ofinjection device in the form of a syringe, preferably, though notnecessarily, of the hypodermic type.

The improvement of'this invention involves the employment of a syringeunit comprising an applicator section or body equipped with a suitablenozzle or needle injecting means and valve control instrumentalities forpermitting and regulating the passage of the medicament to be injectedfrom said applicator unit to the part of the body to which the latter isapplied.

My improved syringe additionally comprises what is herein termed anoperating section or barrel, containing instrumentalities whereby energyis stored up in certain medicament expelling means whereby to cause theejection of the fluid or medicine contained in a suitable ampoule orcartridge adapted to be received in the applicator section or body ofthe instrument.

A primary object of the general construction of my syringe lies in theprovision of the operating instrumentalities self-contained in theoperating barrel or section such that by an initial manipulation ofsuitable parts a pressure force may be created in said operating sectionand caused to be applied to the medicament contained in the applicatorsection Without requiring the energizing of suchforce by the surgeon asan incident to the actual injection manipulation of the instrument.

More specifically, in reference tothe novel operating instrumentalitiesabove referred to, my operating section or barrel forming a part of thesyringe is equipped With a Spring propelled DiS- ton member or plateadapted for cooperation to apply pressure to the medicament in theapplicator section, there being associated with said plateinstrumentalities for storing up a pressure force in the operatingsection, prior to the manipulation of the entire syringe to causeapplication of the applicator member to the body, the valve meanspreviously referred to being availed of to release the medicament and atthe same time enabling the said stored up pressure force to act thereonfor performing the medicament expelling function.

My invention consists of other detail features of construction andoperative phases of my improved syringe which will appear more fullyupon reference to the following description in conjunction with theaccompanying drawings, in which:

Figure 1 is a longitudinalsectional view of my syringe showing themedicine ampoule or car- 55 force for the expulsion of the medicine fromthe Y applicator upon opening of the valve control means. Y Y

Figure 2 is a fragmentary side view of the main parts of the instrumentillustrating the swinging and locking connection between the applicatorVsection and the operating section, dotted lines illustrating themovement of the operating section out of alignment with the applicatorsection as required preliminary to the insertion of the ampoule ormedicine cartridge into the applicator section.

Figure 3 is a sectional view of the ampoule or medicine cartridge alonein the condition in which it is inserted into the instrument.

Figure l is a view similar to Figure 3, showing the diaphragm of theampoule tilted to permit mixing of the distilled water or liquid in theampoule With the medicine therein contained to condition the medicinefor ejection from the syringe through the needle or other applicatormeans.

Figure 5 is a View similar to Figure l, disclosing a modiedadaptation ofthe invention.

Figure 6 is a sectional view similar to Figures 1 and 5, showing afurther modication of the invention.

Figure 7 is a view of the operating section of the syringe of theconstruction of Figure 6, dis- -closing preliminary positions of certainelements before the actuating and ejector pistons have been moved tostore up energy inthe ejector` actuating spring.

Figure 8 is a sectional view of the ampoule or cartridge used in thesyringes of Figures 5 and 6 before the medicament hasw been mixed withthe liquefying agent or water thereof.

Figure 9 is a View similar to Figure 8, showing the medicament shiftingplunger as when actuated to effect the mixture of the medicament andwater.

Figure 10 is a sectional view on the line Ill-I0 of Figure 7.

Figure 11 is a Vfragmentary sectional view of4 the operating section ofthe instrument, similar to Figure 1, spring parts appearing as whenactuated by the manual turning handle.

Describing my construction of syringe in detail and referringparticularly to Figure l, the mechanical features comprise an applicatorsecd. tion of the body generally designated A, and an operating ormedicament expelling section B. The section A includes the applicatornozzle or head I which may or may not be equipped with an injectingneedle 2 of the customary hollow form, though the latter is ordinarilyused for the purposes of the invention. The head I is screwed into thesleeve or tube 3 as shown at 4 and is therefore removably mountedthereon. Adjacent to the head I.there is positioned in the sleeve 3 inan immovable manner the plug or thick wall member containing passagemeans therein in the form of a resilient or rubber tube 6, the centralpassage of which registers with the hollow portion or passage of theneedle 2 and also registers with a passage 'I centrally formed in apiston member 8 aflixed in the sleeve 3 in a stationary manner at theinner side of the wall member 5 previously referred to. The passagemember 6, being resilient, is adapted to be closed and opened byengagement of the reduced end portion Sa of a valve stem 9 which ismovable transversely through an opening in the side of the sleeve 3 andis operable by a valve lever I0 spring actuated by spring II to normallyhold parts 9 and 9a in a position contracting the passage in the passagemember 6 to close the same, as seen in Figure 1.

Associated with the applicator member A is the member B previouslymentioned, which has locking, sliding, and swinging connecting meanswith the member A. Said means is obtained by the provision on the barrelor hollow section I2 of the operating member B ofspaced arms I3 whichhave pivot members I4 projecting inwardly therefrom to enter slots I5 inopposite sides of the inner end of the sleeve 3 of the applicatorsection A. The slots I5 have the end lateral extensions I5a to providelocking portions'. By sliding the operating section B leftward as seenin Figure 2 and then rotating said section B slightly, the operatingsection is lockingly connected to the applicator section A by means ofthe pivotal members, pins, or projections I4 entering the lateralextensions |5a of said slots I5. Such arrangement locks the sections Aand B in alignment.

By rotating the section B oppositely and shifting the samelongitudinally with the parts I4 moving in the slots I5, the parts A andB may be separated as shown in Figure 2 and the part B swung to aposition permitting the insertion of a medicine cartridge or ampouleinto the applicator section A. This likewise is known practice in suchinstruments.

Passing now to the construction of the operating section B of thesyringe, said section comprises the barrel member I2 previouslymentioned, the members I3 previously mentioned, an end wall or ria-ngeI6 adapted to abut with the inner end of the applicator section A, andan outer end wall or closure I'I. Within the section B is disposed theejector plate I8, the partition I9, and the actuating piston 20. Theejector plate I8 is movable through an opening 2I at the inner end ofthe barrel member I2. It is ailixed at one side to the innermost end ofthe energy storing spring 22 mounted in the spring enclosing tube 23which is aflixed at one end to the partition I9. In its outer end thespring tube 23 is provided with a movable energy storing piston member24 having a bearing on the outer end of the spring 22. In the space ofthe barrel member I2 located between the parts I9 and 24, and the part2U, a pressure fluid, preferably water, is

contained and adapted to be subjected to compression by the piston 2D,previously mentioned.

Passing through an opening in the end closure I'I of the barrel I2 isthe threaded portion of a screw 25 having a turning handle 26. The innerend of the screw 25 engages a surface member 23a at the outer side ofthe piston 20. Operation of the screw 25 is adapted to move the piston20 inwardly in the barrel I2 subjecting the water in the compartmentportion 2'I of the barrel to compression. Surrounding the spring tube 23is a coiled spring 28 secured at one end to the member I9 andconstituting a restoring spring for a purpose to be hereafter described;also spring 28 is attached to plate I8.

Referring now tothe ampoule or medicine cartridge, seen in Figures 3 and4, it is notable that this cartridge comprises a tube 29 having at oneend a rubber closure 30 adapted to be penetrated by the penetratingtubular needle 3| which is aiiixed to the valve part 5 previouslydescribed. At the opposite end of the tube 29 is a second plug or pistonpart 32. About midway of the ends of the tube 29 is a displaceablepartition 33 having water-tight connection with the inner Wall of thetube at its periphery. Carried by the plug 30 by a needle member 34 isthe medicine containing tube 35 which may contain a liquid medicine or amedicine in dry or powdered form, The partition 33 forms a closure forthe outer open end of the medicine containing tube or receptacle 35 andseparates this receptacle and the compartment 35 in which it is disposedfrom the compartment 3l provided between the members 33 and 32, In thecompartment 3'I is received and contained distilled water intended to bemixed with the medicine in the receptacle 35 for producing the medicinalfluid or liquid to be injected by means of the syringe or to be expelledfrom the head I if this head is designed as a nozzle or similarapplicator instead of being equipped with the needle 2.

It is notable that the rubber plug or piston 3U of the ampoule 2S isformed with a recess 3a establishing a passage of slightly less lengththan the width of the piston. The screw 25 would preferably have aswivelling Contact with the plate portion 20a of the piston 20.

If desired, and the medicament used is not subject to deterioration fromlight, such medicament may be emplaced in the space or compartment 35,though preferably it may be carried in the tube or receptacle 35.

The :operation of the syringe and ampoule means will now be described.

With the applicator and operating sections A and B, respectivelydisposed substantially as in Figure 2, the section B is swung to oneside and the lampoule as seen in Figure 3 is inserted in the open end ofthe sleeve 3 of the section A. The section B of the syringe is thenswung back into alignment with the section A and forced toward saidsection A, the pins I4 moving in the slots I5, This action causes theflanged portion I6 of the section B to engage the ampoule or cartridgeand move it longitudinally in the sleeve 3 toward the head I. The inward'movement of the ampoule is limited and xed for the operating adjustmentthereof by means of a flange 38 integral with and interiorly of thesleeve 3. In the action of moving the ampoule to the position of Figure1 as described the metal plunger 8 of the applicator unit A hascontacted with the rubber plunger or piston 30 of the ampoule as thelatter slid to its home position limited by ythe member 38.k During thisrelative motion of the part A and the ampoule, the medicament tube 35Which is oi center or eccentric to the axis of the sleeve strikesV thepartition or diaphragm 33 and tilts the same to the position of Figurel, thus permitting the distilled water in the compartment 31 of theampoule to mix with the medicament located either in the chamber 35 orin the tubular receptacle 35. The medicament dissolves in the distlledWater and is ready yto be used and the ampoule or cartridge with itsenclosed parts is disposed as is illustrated in Figure 1, wherein itwill be seen that the needle 3| has penetrated the rubber plunger 33 andentered .the recess 33a thereof so that the medicament may enter saidneedle. At this time the medicament has been dissolved and is ready foruse but no flow thereof from the syringe has taken place since the valvemeans 6 and 9 remain closed.

Next the operating section B of the syringe is turned so as to lock thesame in relation to the section A by the projections i4 entering .theportions I5a of the slots I5.

he knob or handle 2 is now given a few turns whereby to move inwardlythe actuating piston 2li, thereby compressing the liquid or water in.the compartment 21. The pressure thus exerted upon the said uid in thecompartment 21 acts upon the smaller energy storing piston 24 so as tomove the same toward the section A of the syringe and compress thespring 22 storing up energy in said spring. At this time the spring 22cannot act to expend its energy on the ejector plate I8 because theplate I3 is in abutment With 4and stopped from movement by the rubberplunger or piston 32 of the ampoule.

With the spring 22 now under compression and with stored energytherefore, the syringe is ready to be used.

The surgeon or operator by grasping the body portions of the syringecomprising the members A and B will insert the penetrating needle 2 intothe patient. In this operation it is not necessary for the user toconcern himself about holding the syringe in the manner oi the ordinarysyringe requiring the thumb to be held upon vthe piston actuating memberthat forces the medicament into the body of the patient. Foradministering .the medicament through the needle 2 the user simplydepresses the outer spring actuated end of -the valve lever Ill, raisingthe stem 9, releasing .the pressure on the rubber valve sleeve S. Thispermits the oriiice of the sleeve to open and frees Ithe medicament sothat the same may pass through the needle 3|, sleeves 6, and needle 2,to the point of administration. The egress of the medicament in theampoule being permitted by the opening of the valve 6, the stored upenergy in the compression spring 22 acts on the ejector' plate I8 andforces the ejecting plunger or piston 32 of the ampoule in the directionof the head I, thereby with piston elect forcing the medicated fluid inthe ampoule to the point of application desired. The piston or plunger32 will move las long as the valve 6 is kept open, and the valve may beclosed and opened several times or just once, so that regulation of theamount of medicament administered will be had as maybe desired orrequired. The movement of the member 32 will be limited by its ultimatecontact with the tube 35, at which time the medicament will besubstantially exhausted.

After all the medicament is used, the user of the instrument willunscreW the knob 26 and thus the actuating piston will be drawn backtoward .the closure member |.1. This releases` the pressure'in thecompartment 21 containing lthe Water, and the spring 28,encirclingt-hetubu-v lar extension 23, being connected at .one end .to the'ejector plate I8 and at the other end to thel partition I9, Will pullthe plate I8 toward thehandle26 and thus act upon the spring 22 tocause" said spring to restore the small energyv storing piston 24 to itsnormal position in the instrument as shown in Figure 1.

The members A and B of the syringe are then unlocked by disengaging theparts I4 .and 15a, the section B isswung to one side, and the exhaustedampoule which will bewithdrawn from the applioator section A may bediscarded and a fresh arn-v poule or cartridge inserted in its place forthe purposes of the next use of ythe instrument.

I have illustrated in Figures 5 to 9 inclusive modified features ofconstruction of syringesembodying the principles of my invention Vaspree: viously described, together with a modified form of ampoule orcartridge.

In the modified lconstructions of my invention at last referred to,certain parts are substantially the same in construction as thosepreviously set forth in reference to the syringe of Figure 1, and theyare similarly designated in Fig-ures v5 to 7 inclusive. 4

First I will set forth the novel form of ampoule employed in my modifiedconstructions of syringe. n Y

Referring to Figure 8, Athis ampoule will be seen toV comprise theVenlarged body 40 having the tubular extension 4I. The body 40 Visequipped with a closure member or plug 42 similar tothe previouslydescribed plug or piston member 32. The tubular extension 4| is designedto hold a medicament 43 in powdered form separated from the liquid(water) 44 in the body 40 by means of a displaceable diaphragm 45. Invthe outer end of the extension 4I of the ampoule is located the smallplunger 45 having the pro-l truding pressure or nger piece 41 and formedwith a longitudinal recess 48 terminating short of the` outer end of themember 41, the latter being adapted to be penetrated by the needle 3| aspreviously described in relation to the construction of Figure l.According to my modied construction of ampoule it is intended that themixture of the dry or other medicament 43 and liquid i4 shall beeffected by hand pressure, pushing in on the plunger 46 at the ngerpiece41. This mixture will be performed previous to placing the ampoule inthe syringe. After the mixture has been thus effected, the ampoule willbe disposed in the applicator section A of the syringe member in thesame manner as previously described in reference to the Figure 1construction.

However, the body portion 40 of the ampoule will engage a shoulderportion 49 of the applicator section when the ampoule vis placed in theapplicator section A', the inward movement of the ampoule being thuslimited. The operating section B of the syringe is somewhat similar tothat of the construction of Figure 1, excepting that the inner end ofsaid section is somewhat enlarged at 5|), and this portion is providedwith the interlocking slide pins 5| similar to the pins I4 previouslydescribed. At its outer end the section B' is also enlarged as seen at52 to provide a chamber for Water 53 and for the actuating piston 54movable by the screw 25 under turning action of the handle 26 asdescribed Vin my preferred construction. Y Arpartition 55 divides thesection B.' into the..

chamber holding the water 53 andthe spring and ejector chamber 56. Atubular member 51 contains the energy storing spring 58 secured at oneend to the energy storing piston 59 and at the opposite end to theejector plate 60, the piston 59 and the spring 58 being Within themember 51. External to the member -51 is a pull-back spring 6| forrestoring the plate 60 to its normal actuating position preliminary touse of the syringe.

In operation, the ampoule is emplaced in the applicator section A of thesyringe in the man ner previously described with regard to Figure 1,after the medicament, and water for liquefying the same, have beenmixed. The operating section B' of the syringe is then swung intoalignment with the section A' as previously described, and movedlongitudinally to slide the sections together until the shoulder `5&1'of the portion 50 engages the inner end of the section A' and abuts withthe right hand end of the body of the ampoule. The medicament is nowready to be dispensed, and for this purpose the knob or handle 26 willbe turned in order to move the actuating piston 54 inwardly, thereby toforce the water 53 in the chamber containing the same against the energystoring piston 59. This action moves the piston 59 and compresses thespring 58, thus storing up energy in the ejector plate 60 by which toforce the plug or piston 42 toward the nozzle or head l when flow of themedicament to the patient is to be effected. Upon opening of the valve 6by the hand lever I0 the medicament entrapped in the ampoule will bereleased and the plug r pistonV 42 will be moved by the ejector plate 65to effect the flow of the medicament through the needles 3| and 2 asdescribed in relation to the Figure 1 construction. When the medicamenthas been administered to a patient, the handle 26 is unscrewed and thispermits the spring 58 to return the energy storing piston 59 to itsposition of Figure 5 and permits the spring 6l to pull the ejector plate60 back to its position of Figure 5. The operating section B is thenunlocked from the section A', and the two sections moved apart so tospeak, and the section B swung to one side to permit the removal of theemptied ampoule.

The construction in Figures 6 and '1 is somewhat similar to that inFigure excepting that in this modification of Figure 6 the manuallyoperable knob and associated parts are done away with. In thisconstruction it is contemplated to utilize the movement of the operatingsection B relatively to the applicator section A" to store up the energyin the ejecting piston and spring and ejector spring plate means for.causing the ejection or expulsion of the medicament fluid from theinstrument. Parts in this construction similar to the construction ofFigure 5 are correspondingly designated. It is notable however that inFigure 6 the operating section B" contains intermediate its ends theactuating piston 62 adapted to be engaged with the adjacent ends of theapplicator section A so that the latter will move the piston 62 in theoperation of pushing the two sections A and B" together in a slidablemanner, after which they are interlccked as by the means ia used in theFigures 1 and 2 construction. The action of moving the piston 52 asstated compresses a spring 63 in the section B and forces water in thesection B at the right of the piston 62 into the tubular springcontainer 64. The spring container 84 also contains the energy storingpiston 65 functioning similar to the piston 59 and cooperating with thespring 66 connected to the ejector plate 61. At the end of the pistonopposite the spring 66 is a restoring spring 68. Looking at Figures 6and 1, therefore, it will be seen that when the piston 62 is forced tothe right in the act of coupling interlocking engagement of the sectionsA and B", if the ampoule has been placed in the section A". The water 69in the section B" will be caused to enter the right hand end of the tube64, will move the energy storing piston 55 to the left, placing thespring 66 under stored operating tension against the ejector plate 61.Then when the needle 2 of the syringe has been forced into the patientfor injection purposes, the user of the syringe merely actuates thelever I0 for the valve 6 and upon opening of the valve the medicament inthe ampoule ll will flow for intravenous administering to the patient.When the ampoule has been emptied the syringe members A" and B will bepulled apart slidably as permitted by the extent of movement of the pins10 and the ampoule may be displaced. Thereupon, the spring 53 will bepermitted to expand and shift the actuating piston 62 leftward to assumeits normal position maintained thereby previous to the pushing togetheroperation of the two sections A and B of the syringe. When the piston 62is so moved by the spring S3 the spring 68 connected to the piston 65 atits left end and to the outer end of the section B at its right end willrestore the piston 65 to its normal position of Figure '1, causing acertain amount of the water entering the tube 64 to pass into the bodyof the section B so that the parts assume the relations in Figure 7.

A spider or web member 15 positions the member 64 in the member Bagainst movement therein.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States, is:

1. A syringe comprising an applicator section, an operating sectionmovably mounted thereon, the applicator section having a medicamentcharge containing means, an energy storing spring in the operatingsection, ejector means for the medicament operable by said spring, andmeans adapted to be actuated incident to relative movement of theapplicator and operating sections ofl the syringe for storing up energyin said spring by which to move the medicament ejector means, includingan actuating piston in the operating section engageable by theapplicator section for shifting said piston, an energy storing pistonfor storing up energy in said spring, and

' a liquid interposed between the actuating piston and the said energystoring piston for moving the latter incident to the action of theactuating piston shifting the liquid in the operating section inrelation to the energy storing piston.

2. A syringe comprising an applicator section, an operating sectionmovably mounted thereon, the applicator section having a medicamentchargev containing means, an energy storing spring in the operatingsection, ejector means for the medicament operable by said spring, meansadapted to be actuated incident to relative movement of the applicatorand operating sections of the syringe for storing up energy in saidspring by which to move the medicament ejector means, including anactuating piston in the operating section engageable by the applicatorsection for shifting said piston, a springA cooperating with the ejectormeans of the applicator section, an energy storing piston for storing4up energy in said spring, a liquid interposed between the actu- 9 atingpiston and the said energy storing piston for moving the latter incidentto the action of the actuating piston shifting the liquid in theoperating section in relation to the energy storing piston, and meansfor restoring the energy storing piston and the actuating piston tonormal positions when relative movement of the applicator and operatingsections is effected oppositely to the rst mentioned relative movement.

3. In a syringe, in combination, an applicator section comprising anapplicator member for administering a medicament, the said applicatormember being provided with an exit passage for medicament contained byan ampoule therein, valve means controlling said passage, an ampoulecontaining medicament emplaceable in the applicator member and includingan ejecting piston, an operating section associated with the applicatorsection of the syringe and comprising an energy storing spring coactingwith the ejecting piston, and an instrumentality for storing up energyin said energy storing spring for moving the said ejecting piston whenthe medicament of the ampoule is released by control of the valve meansto enable the medicament to pass to the applicator member, an energystoring piston coacting with said spring, an actuating piston in theoperating section operable incident to movement of the instrumentalitymentioned, and said operating section having a uid holding compartmentintermediate said actuating piston and said energy storingr piston.

4. A syringe as claimed in claim 3, combined with a restoring springassociated with the energy storing spring to restore the latter to itsoriginal condition upon adjustment of the actuating piston to itsoriginal position previous to operation thereof.

5, In a syringe, in combination, an applicator section comprising anapplicator member for administering a medicament, the said applicatormember being provided with an exit passage for medicament contained byan ampoule therein, valve means controlling said passage, an ampoulecontaining medicament emnlaceable in the applicator member and includingan ejecting piston, an operating section associated with the applicatorsection of the syringe and comprising mechanical energy storing meansnormally conditioned without stored energy, an instrumentalitycooperable with the operating section for storing up energy in saidenergy storing means for moving the said ejecting piston when themedicament of the ampoule is released by control of the valve means toenable the medicament to pass to the applicator member, an ejector plateon the operating section associated with said mechanical energy storingmeans and coacting with said ejecting piston to move the same, saidoperating section having a fluid holding compartment intermediate saidinstrumentality and said energy storing means, together with means forautomatically restoring the ejector plate and energy storing means totheir normal condition and positions upon release adjustment of saidinstrumentality after the energy of the energy storing means haseffected the movement of the ejecting piston.

6. In a syringe, in combination, an applicator section comprising anapplicator member for administering a. medicament, the said applicatormember being provided with an exit passage for medicament containedtherein, valve means controlling said passage, ejecting means forejecting medicament from the applicator section, and an operatingsection associated with the applicator section and including amechanical energy storing means coacting With the ejecting means andnormally conditioned Without stored energy, an instrumentality forstoring up energy in said mechanical energy storing means for effectingmedicament expelling action oi said ejecting means under control of saidcontrolling means, a manually operable actuating piston, an energystoring piston forming a part of the storing means, and a body of liquidbetween the last mentioned piston and the actuating piston, and meansfor automatically restoring the actuating and energy sto-ring pistons tooriginal normal conditioned adjustments upon release adjustment of saidinstrumentality.

7. A syringe comprising an applicator section adapted to receive amedicament charge, ejector means for expelling the medicament chargefrom the applicator section, controlling means for controlling passageoi the medicament charge from the applicator section, an operatingsection associated with the applicator section of the syringe andcomprising an energy storing spring normally conditioned Without storedenergy and coacting with the ejector means, an instrumentality forstoring up energy in said energy storing spring for effecting medicamentexpelling action of the ejector means under the control of saidcontrolling means, an energy storing piston coacting with said spring,an actuating piston in the operating section operable incident tomovement of the instrumentality mentioned, said operating section havinga fluid holding compartment intermediate said actuating piston and saidenergy storing piston, and means for automatically restoring the energystoring piston to its original condition upon release adjustment of theactuating piston after the ejector means has been operated by thespring.

8. A syringe as claimed in claim 7, in which the restoring meansincludes a spring connected to the energy storing piston.

9. A syringe comprising an applicator section adapted to receive amedicament charge, ejector means for expelling the medicament chargefrom the applicator section, controlling means for controlling passageof the medicament charge from the applicator section, an operatingsection associated With the applicator section of the syringe andcomprising an energy storing spring coacting with the ejector means, aninstrumentality for storing up energy in said energy storing spring foreffecting medicament expelling action of the ejector means under thecontrol of said controlling means, an energy storing piston coactingwith said spring, an actuating piston in the operating section operableincident to movement of the instrumentality mentioned, and saidoperating section having a iiuid holding compartment intermediate saidactuating piston and said energy storing piston.

l0. A syringe comprising an applicator section adapted to receive amedicament charge, ejector means for expelling the medicament chargefrom the applicator section, controlling means for controlling passageof the medicament charge from the applicator section, an operatingsection associated with the applicator section of the syringe andcomprising an energy storing spring coacting with the ejector means, aninstrumentality for storing up energy in said energy storing spring foreffecting medicament expelling actionl of the ejector means under thecontrol of said controlling means, an energy storing piston co- 11acting With said spring, an actuating piston in the operating sectionoperable incident to movement of the instrumentality mentioned, saidoperating section having a fluid holding compartment intermediate saidactuating piston and said energy storing piston.

11. A syringe as claimed in claim 7, wherein the restoring meansincludes a spring connected to the operating section and operativelyassociated with the energy storing piston.

12. A syringe comprising an applicator section adapted to receive amedicament charge, ejector means for expelling the medicament chargefrom 12 the applicator section, controlling means for controllingpassage of the medicament charge from the applicator section, anoperating section associated with the applicator section of the syringeand comprising energy storing means coacting With the ejector means, aninstrumentality for storing up energy in said energy storing means foreffecting medicament expelling action of the ejector means under thecontrol of the controlling means, and said operating section having auid holding compartment intermediate said instrumentality and saidenergy storing mean-s.

MARVIN L. FOLKMAN.

